From 670a4056e2cf31c89305db0dad7b515ba3cc0cab Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Fri, 5 Jan 2018 07:09:29 +0000
Subject: [PATCH] Need to convert '/' back to '\' when creating a path.
 Ideally, this would be filesystem type dependent, but that's difficult to
 accomplish and it's unclear how the UEFI firmware will cope. Be conservative
 and make boot loaders cope instead.

Sponsored by: Netflix
---
 lib/libefivar/efivar-dp-xlate.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/libefivar/efivar-dp-xlate.c b/lib/libefivar/efivar-dp-xlate.c
index 5c9398d9f43f..a0a61e710dd6 100644
--- a/lib/libefivar/efivar-dp-xlate.c
+++ b/lib/libefivar/efivar-dp-xlate.c
@@ -527,12 +527,17 @@ find_geom_efimedia(struct gmesh *mesh, const char *dev)
 static int
 build_dp(const char *efimedia, const char *relpath, efidp *dp)
 {
-	char *fp, *dptxt = NULL;
+	char *fp, *dptxt = NULL, *cp, *rp;
 	int rv = 0;
 	efidp out = NULL;
 	size_t len;
 
-	fp = path_to_file_dp(relpath);
+	rp = strdup(relpath);
+	for (cp = rp; *cp; cp++)
+		if (*cp == '/')
+			*cp = '\\';
+	fp = path_to_file_dp(rp);
+	free(rp);
 	if (fp == NULL) {
 		rv = ENOMEM;
 		goto errout;